diff --git a/src/backend/catalog/objectaddress.c b/src/backend/catalog/objectaddress.c
index 967e055b4d..9edab108df 100644
--- a/src/backend/catalog/objectaddress.c
+++ b/src/backend/catalog/objectaddress.c
@@ -5035,7 +5035,7 @@ getObjectIdentityParts(const ObjectAddress *object,
 					elog(ERROR, "cache lookup failed for event trigger %u",
 						 object->objectId);
 				trigForm = (Form_pg_event_trigger) GETSTRUCT(tup);
-				evtname = NameStr(trigForm->evtname);
+				evtname = pstrdup(NameStr(trigForm->evtname));
 				appendStringInfoString(&buffer, quote_identifier(evtname));
 				if (objname)
 					*objname = list_make1(evtname);